For citations:
Severskaya N.V., Semin D.Yu., Ilyin A.A., Ryzhenkova M.I., Chebotareva I.V. Difficulties of differential diagnostics of primary hyperparathyroidism and sarcoidosis of cervical lymph nodes. Problems of Endocrinology. 2015;61(1):57-60. (In Russ.) https://doi.org/10.14341/probl201561157-60

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